I have noticed there aren't a lot of guiding lines for Achievements on the Internet, so I might as well write one for you.

1. Paleozombology

Complete Act 3 by defeating the boss without the forklift.In order to get this achievement, you have to complete the level of act 3, and it is impossible to move on without using any forklift. My best advice, don't hit the big dinosaur with any weapons you have besides surrounding it with your alliances.

2. Occupy Town Hall

Complete all 20 blocks in Town Hall Survival.If you're tired of starting all over again, then you've got to have a good sense in order to get this achievement. Should you feel you will not be able to finish a level, leave the level before you're sentenced "death". By doing so, you can continue the same level over and over until you manage to finish it.

3. Con-GRAVE-ulations

Complete all 10 blocks in Graveyard Survival.Refer to the above suggestion.

4. Grand Theft Auto

Open 20 vehicles.Cars can most be found in the late stage of any level. Try Act 1 level 5. The fastest way to get this achievement is to open the car and restart the block. Keep restarting until you get 20 vehicles.

The above 4 achievements are the hardest in my mind and I think those required some advices. Should you need any help, feel free to comment. Good Luck!

Hi A.D.Mynx, cars can hardly be found (maybe less than 1%) in the survival mode. As I mentioned, try Act 1 Block 5. If you couldn't find any, go through the entire Act 1 and click on any car you have come across. Good Luck!

Hi Chris, as for me, I played quite a lot of Freeway Survival (which gives me about 130-150 zombies in around 5 mins and Graveyard Survival (which gives me about 160-200 zombies in around 7 mins. It all depends on how good you are to combo it up, I'm sure your skills will be horned up by the time you killed 5 thousand zombies. Anyway, you will definitely need a couple hours to get the achievement of Zombies Tickler, good luck!